This verb follows the consonant-vowel-consonant (CVC) pattern. The final consonant is doubled before adding -ed to maintain the short vowel sound.
Sister is regular. It follows the Consonant Doubling rule.
Use past time markers: "Yesterday, she sisterred to the store."
No. Use "did not sister" (not "did not sisterred").
The verb sister follows the standard English past tense conjugation rule. When forming the past tense, sister becomes sisterred. This follows the Consonant Doubling pattern, which is one of the most common conjugation rules in English.
Understanding why sister becomes sisterred helps with spelling and pronunciation. This verb follows the consonant-vowel-consonant (CVC) pattern. The final consonant is doubled before adding -ed to maintain the short vowel sound.
When using sisterred in writing, remember that it functions as a past tense verb and typically appears with time markers like yesterday, last week, or ago. For example: "Yesterday, she sisterred to the store." The past tense form does not change based on the subject — I sisterred, you sisterred, he/she sisterred, we sisterred, they sisterred.